"You're starting to see American military transports that originate in U.S. military installations, where marine infantry and special forces operate and plan covert action," Cuban Foreign Minister Bruno Rodriguez said in Havana.

Rodriguez told journalists that the US military is quickly building up assets unbeknownst to Caribbean governments where their bases are located.

Journalists questioned what evidence Cuba has the US is preparing to stage a military operation to overthrow Venezuelan President Nicolas Maduro. Rodriguez told Local 10's Cuba correspondent Hatzel Vela to examine the airports where he would uncover evidence of the buildup.

At a speech in Miami on Monday, President Trump called on the Venezuelan military to overthrow Maduro whose failed socialist policies have turned the oil-rich country into an economic hellhole. Trump's speech came two weeks after Washington imposed new sanctions against Venezuela's national oil company, a move that could topple the finances of the Maduro regime.